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