If you just got her and she has not had time to unwind from the move or the stress of being in a new habitat, I would suggest that your first step would be to not handle her for at least a week or two. This will give her time to acclimate to the new enclosure. If you have already done this or after you do this. You may try to handle her again. Generally it will be a matter of time until she becomes handleable (Remember not all snakes can be tamed). Kingsnakes usually do this for a while though and then settle down.

One thing to remember, pick her up from underneath her body, not from above. Natural predators would attack from above, so you want to avoid this approach when picking up your snake.

Sorry if you already knew all of this and I am just restating what you already know.