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