Under Plot: Categorical menu, there are multiple variations of grouped box chart, e.g. Grouped Column - Scatter, Grouped Mean Bar - Indexed, Grouped Half Violin - Indexed, Grouped Half Box - Indexed, they all open plot_gboxindexed dialog. User can also change it by change the variations by Graph Theme dropdown list in the dialog.
As long as there is data points showing, Data Points Color by control will show for user to specify which column will be used to color the points.
The following graph also set legend to show Categorical Values so coloring info. show in legend.