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