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