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