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