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