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