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