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