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