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