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