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