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)(11,13)(12,14)(15,16)(17,18,23,26)(19,21,25,22)(20,24,29,32)(27,30,31,28)(2,5)(3,7)(9,10)(11,15)(12,14)(13,16)(17,19,22,18,23,25,21,26)(20,27,28,24,29,31,30,32)(2,5)(6,8)(9,11,12,16)(10,13,14,15)(17,20,23,29)(18,24,26,32)(19,27,25,31)(21,30,22,28)(1,3,4,7)(2,6,5,8)(11,16)(13,15)(17,19)(18,21)(20,27)(22,26)(23,25)(24,30)(28,32)(29,31)(10,14)(13,15)(17,21,23,22)(18,25,26,19)(20,28,29,30)(24,27,32,31)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.