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