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