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