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