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