Jitter points within branches keeping custom preview

Hello, 

Probably a simple solution I can't figure out.

As attached, i have 5 zones filled with points. each zone has 3 categories of points (residential, commercial, amenities) previewed in different colors.

How could i shuffle them within their own zone (so they are not clustered), but still keeping color differentiation?

And how to do it by using some rules? (attractor points, etc).

Thanks!