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)(19,24)(20,25)(21,22)(23,27)(26,31)(28,29)(30,32) involution — undirected(1,2)(3,4)(5,6)(7,8)(9,10,12,14)(11,13,16,15)(17,19,23,25)(18,24,27,20)(21,28,26,32)(22,29,31,30)(2,6)(3,7)(9,10,12,14)(11,13,16,15)(17,20,23,24)(18,19,27,25)(21,30,26,29)(22,28,31,32)(3,7)(4,8)(9,10,12,14)(11,15,16,13)(17,21)(18,22)(19,28)(20,30)(23,26)(24,29)(25,32)(27,31)(1,3)(2,4)(5,7)(6,8)(9,10)(11,13)(12,14)(15,16)(17,20)(18,25)(19,27)(21,29)(22,28)(23,24)(26,30)(31,32) involution — undirected(1,4)(2,3)(5,8)(6,7)(9,11,12,16)(10,13,14,15)(17,22)(18,26)(19,29)(20,28)(21,27)(23,31)(24,32)(25,30)A 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.