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