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