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