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