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