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