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