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