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