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