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