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