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