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