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