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)(11,16)(12,15)(13,14)(18,19)(20,24)(25,26,30,32)(27,31,29,28)(2,6)(4,7)(10,13)(15,16)(17,18,21,19)(20,23,24,22)(25,27)(26,28)(29,30)(31,32)(9,11,14,12)(10,15,13,16)(17,18,21,19)(20,22,24,23)(25,28)(26,29)(27,32)(30,31)(1,3,5,8)(2,7,6,4)(9,12,14,11)(10,15,13,16)(17,19,21,18)(20,22,24,23)(25,28)(26,27)(29,32)(30,31)(1,4,5,7)(2,3,6,8)(9,13,14,10)(11,16,12,15)(17,20,21,24)(18,22,19,23)(25,29,30,27)(26,31,32,28)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.