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