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