Wetsuits are not cute; I speak from vast experience here. I bought my first wetsuit when I was 12 and got my scuba diving certification...and I still have the same one. This would be kind of fun - look at meeee, fitting into my preteen wetsuit! - except it's sort of like still being able to fit into an Ace bandage that happens to be purple, and cover your whole body. You can do it...but that doesn't mean it's necessarily a great idea.
The thing about wetsuits is they're meant to be functional. You don't wear them to be adorable; you wear them to not freeze. And so the best-looking ones I've seen - up until now, at least - are only "cute" because they're not terrible and/or neon. In other words, they are black.