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