My daughter is 19months and we have the OPPOSITE problem. She is a daddy's girl and prefers him over me! But, it's because I was afraid early on that we had bonded more than she and my husband had so I set up lots of daddy/daughter time so they could bond and the plan backfired slightly :)! But, I do thing the suggestion to set up some time for them is a good idea. Home Depots Children's workshops are excellent! My husband takes my daughter to the pet store to look at the animals sometimes too and she loves that.
I might also suggest that an outing may be a better way to facilitate bonding. Your daughter probably associates you with the home environment as dad is probably out at work more often than you are and she's probably home with you more right? So, start slow and have him take her somewhere fun and then once she warms up to him after one or a few outings, then you can try the home playdate while you go out for some most likely well deserved alone time!
Also, it is very important to respect your daughter's boundaries to teach her how to have healthy ones when she grows up. When kids say they don't want to show affection and we force them too, then later on when she's a teenager she might be in a similar situation with a boy. There's research on this stuff, I probably sound like a nut but I promise I'm not making it up :). It's important to validate her feelings and if your hubby asks for a hug and she says no, he should tell her that that's okay and when she's ready he'll be there.
My daughter is VERY shy around strangers. She doesn't speak and she puts her head down and is as still as a statue. People try get her to give them five or say hi and tell her to do those things instead of asking. I never force her and people probably think she's being rude. But, I don't really care what they think. I just tell my daughter that she doesn't have to say hi if she doesn't want to, but that it is a polite thing to do.. and then I leave it alone. I also ask others to respect her and tell them that she's shy and would prefer them to respect her personal space. Okay, I've rambled into an issue somewhat off topic so I apologize and wish you luck!
Good luck!