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