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