A fully colored 2-butterfly diagram for the Trefoil on a sphere. The graph of the butterfly runs the equator in gray with dark blue B-vertices and red A-vertices and E-vertices. The trunks are in purple and the wing identifications in blue.
If you've never heard of a butterfly diagram before, check out this paper
I added some "feet" to the southern hemisphere wings so that it shoould stand up on a desk rather than rolling about like a maniac.