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