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