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