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