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