Waffle chart with multiple categoies in same chart area

Hello! 

I just tried to use this Waffle chart: https://powerbi.microsoft.com/en-us/blog/visual-awesomeness-unlocked-waffle-chart/ 

And it works with the data I have, but it splits up the data in three charts instead of one. So for example, I want to make a chart of the percentage share each group (student, worker, retierees) takes up. With Waffle chart I get one diagram for each insead of them sharing one chart. An my question to you is if there is any visual out there that can accomplish the chart in the example picture?

All in one Waffle chart