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