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