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