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