Hi @MetaLizard62080 ,
I'm not exactly sure what you want the graph to look like, but there are a few ways you can do this in graph builder.
One option is use your two numerical columns as the X and Y in GB, and then use the categorical as (1) an Overlay, or (2) Color, or (3) as a Page option. See the results below -- for these examples, I'm using the Cars.jmp example data table with Wt as the Y, Head IC as X, and Make as the GB option. The graphs looks crazy busy, but it's because there are so many different Makes of cars. Hopefully your graph isn't as busy.
(1)
(2)
(3) Here I did a screenshot because it crease a separate GB for each Make of vehicle.
This should at least get you started.
Hope this helps!,
DS