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