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