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