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