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