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