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