Ok, maybe the question was unclear. This is what I would love to see (attached).
My samples are named S1, S2, S3, S4 and so on.
For every point, instead of a point, I would want to see S1, S2 or S3 written instead of a point.
I have deleted some black points on your plot to show what I actually mean.
I think it makes it much easier to spot the groups of the samples and to get an idea of how are they scattered.
It's kinda a preliminary grouping. Now by an immediate looking I can see that S1 clusters together. Ok, let's investigate this further. Instead of manually pressing on 100 points to see which category they belong to.