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