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