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