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