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