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