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