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