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)(17,18,23,24,22,26,19,27)(20,25,30,32,31,29,28,21)(1,3,6,2)(4,7,5,8)(11,16)(13,15)(17,19,22,23)(18,24,26,27)(20,30,31,28)(21,29,32,25)(9,11,12,16)(10,13,14,15)(17,20)(18,25)(19,28)(21,27)(22,31)(23,30)(24,32)(26,29)(1,4,6,5)(2,7,3,8)(10,14)(13,15)(17,21,19,29,22,32,23,25)(18,20,27,28,26,31,24,30)(1,5,6,4)(2,7,3,8)(17,19,22,23)(18,24,26,27)(20,30,31,28)(21,29,32,25)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.