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