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