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