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