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