First of all, congratulations on your beautiful new bike!

There may be a couple of things at work here with regards to your saddle pain. It may just be an evil saddle, plain and simple. I think that everyone here at TE has an "evil saddle" story! It's also possible that the muscles around your sit bones just aren't used to supporting your body yet and they just need a few rides to "wake up".

True story: I took a break from riding several years ago, and focused more on running, playing soccer, etc. When I got back on my bike, my whole "undercarriage" was in agony! Those muscles just weren't used to working like that! After about a week of riding, things started feeling better. It just took some time...

Give it a few short rides, and see how things feel. If, after a week or two, you're still hurting, ditch that evil saddle and find something better!