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