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