One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,7,8,5)(17,18,21,26)(19,27,20,23)(22,31,30,25)(24,28,32,29)(1,3,4,8)(2,5,6,7)(9,10)(11,13)(12,15)(14,16)(17,19,21,20)(18,23,26,27)(22,28,30,29)(24,25,32,31)(10,13)(11,16)(14,15)(17,20,21,19)(18,24,26,32)(22,28,30,29)(23,25,27,31)(2,6)(3,8)(18,25)(22,30)(23,32)(24,27)(26,31)(28,29) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.