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