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