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