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)(17,18,23,28)(19,26,21,25)(20,29,31,32)(22,27,24,30)(1,2)(3,6)(4,8)(5,7)(9,11)(10,13)(12,16)(14,15)(17,19,23,21)(18,25,28,26)(20,27,31,30)(22,32,24,29)(11,16)(13,15)(17,20,24,25,23,31,22,26)(18,19,27,29,28,21,30,32)(1,3,5,4)(2,6,7,8)(10,14)(13,15)(17,21,23,19)(18,26,28,25)(20,30,31,27)(22,29,24,32)(1,4,5,3)(2,6,7,8)(17,22,23,24)(18,27,28,30)(19,29,21,32)(20,26,31,25)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.