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