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