When I let Stella 4d (a program you can try for free right here) choose the colors of this compound, here’s what I was shown.

Next, I chose “color as a compound.”

For the third view, I chose “color by face type,” which yields four colors instead of two.

The fourth model shown here shows this compound in “rainbow color mode.”

Finally, the fifth coloring-scheme I tried was “color by face, unless parallel.”

Which one do you like best? My favorite is the third one shown.