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