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