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