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