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