I have accepted a PhD offer. When to contact potential supervisors?
The matter of when to meet or talk to your POI is definitely subjective, but in my personal opinion there's no harm in keeping in touch, if you expect to have a relationship with this professor in the future. I think that creating a dialogue with this faculty and discussing potential research projects as an incoming student rather than a prospective student places you in a very different position, and is better than blindly looking at her papers, etc. If nothing else, she may be able to guide you to other faculty as she learns more about you and your interest, and doesn't see a good fit. 

Of course, none of this is concrete, but from my experience it was useful to informally keep in touch with POIs across the board and see where I would head in the future, both academically and at jobs.