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