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