Is there a way to group nodes together visually other than using groupId .. and thats not working well either

Like others I assume.. I am trying to visually group 'clusters' if nodes together based on a common attribute. Such as age or gender or whatever. Currently some of the examples it uses groupId.. and the colors are manually on each node.

I would like to visually group based on a different attribute in the node. Is there a way to do that?

thanks in advance!