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