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)(19,21)(20,27)(22,26)(23,29)(24,30)(25,31)(28,32) involution — undirected(1,3,5,2)(4,7,8,6)(9,11,12,16)(10,13,14,15)(17,19,21,18)(20,25,28,23)(22,26,30,24)(27,29,32,31)(11,16)(13,15)(17,20,21,28)(18,23,19,25)(22,31,30,29)(24,32,26,27)(2,3)(6,7)(10,14)(13,15)(18,19)(23,25)(24,26)(27,32) involution — undirected(1,4,5,8)(2,6,3,7)(18,19)(23,25)(24,26)(27,32)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.