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