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