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