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