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)(18,22)(23,25)(24,31)(26,32)(1,3,5,4)(2,6,7,8)(9,11,13,10)(12,15,16,14)(17,18,20,22)(19,26,27,32)(21,23,29,25)(24,28,31,30)(1,4,5,3)(2,6,7,8)(10,11)(14,15)(18,23)(21,29)(22,25)(24,32)(26,31)(28,30)(9,12,13,16)(10,14,11,15)(17,19,20,27)(18,24,22,31)(21,30,29,28)(23,32,25,26)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.