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