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