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