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