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