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