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