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