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