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