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