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