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