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