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)(17,18,22,23,21,26,20,25)(19,24,29,30,27,31,28,32)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16) involution — undirected(10,13)(14,16)(18,23)(20,22)(24,30)(25,26)(28,29)(31,32) involution — undirected(9,11,12,15)(10,14,13,16)(17,19,21,27)(18,24,26,31)(20,28,22,29)(23,30,25,32)(1,3,4,7)(2,6,5,8)(19,27)(24,31)(28,29)(30,32)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.