32 is the cap that was at stand when the hunter was released. Getting one character on an account to 32+ will enable you to create a hunter on that account.
and any other account. It's really a soft-limit, not really enforced (so if you really want to have a hunter, you can file a /support ticket).
The reason for this is that hunters are still a bit rough on the edges, and require more resources (arrows) - so that way, the players testing hunters would have a bit of experience already, instead of going in without any sorts of guidance.