I would like to create a `Graph` like the following:

![enter image description here][1]

but without edges between vertices in the same group.

So I have a graph and I want to plot it such that its vertices are separated into 3 groups away from each other, I prefer that each group is not in line form, but better to be in random form.


  [1]: https://i.sstatic.net/XD1q6.gif