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