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