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