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