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