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