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