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