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