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