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