One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,8,4,6)(9,10,13,15)(11,12,14,16)(17,18,24,28)(19,20,21,25)(22,26,30,31)(23,27,32,29)(1,3,5,4)(2,6,7,8)(9,11,13,14)(10,12,15,16)(17,19,24,21)(18,25,28,20)(22,29,30,27)(23,26,32,31)(1,2)(3,6)(4,8)(5,7)(9,10)(11,12)(13,15)(14,16)(17,20,24,25)(18,19,28,21)(22,23,30,32)(26,29,31,27)(1,4,5,3)(2,6,7,8)(9,12)(10,14)(11,15)(13,16)(17,21,24,19)(18,20,28,25)(22,27,30,29)(23,31,32,26)(17,22)(18,26)(19,29)(20,23)(21,27)(24,30)(25,32)(28,31) involution — undirected(17,23)(18,27)(19,26)(20,30)(21,31)(22,25)(24,32)(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.