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