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