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