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