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