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)(11,14)(12,13)(15,16)(17,18,21,22)(19,23,24,20)(25,26,29,31)(27,30,28,32)(1,3,5,8)(2,6,7,4)(10,12)(14,15)(25,27,29,28)(26,30,31,32)(2,7)(3,8)(9,11,13,16)(10,14,12,15)(17,19,21,24)(18,20,22,23)(25,28,29,27)(26,30,31,32)(1,3)(2,4)(5,8)(6,7)(9,12,13,10)(11,15,16,14)(17,20)(18,19)(21,23)(22,24)(25,26)(27,30)(28,32)(29,31)(1,4)(2,3)(5,6)(7,8) 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.