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