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