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