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