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