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