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