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