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