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