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