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