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