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)(17,18,21,23)(19,26,28,32)(20,25,22,30)(24,27,31,29)(5,6,8,7)(9,11,13,16)(10,14,12,15)(18,23)(24,31)(25,30)(26,32)(6,7)(10,12)(14,15)(17,19,21,28)(18,24,23,31)(20,29,22,27)(25,32,30,26)(2,4)(5,7,8,6)(9,12,13,10)(11,15,16,14)(17,20,21,22)(18,25,23,30)(19,27,28,29)(24,26,31,32)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.