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)(20,27)(21,25)(22,31)(23,26)(28,30)(29,32)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,25)(21,27)(22,29)(23,28)(26,30)(31,32)(9,11)(10,13)(12,16)(14,15)(17,20,27,18,23,31,22,26)(19,25,21,24,28,32,29,30)(1,2,5,4)(3,7,8,6)(11,16)(13,15)(17,21,23,29)(18,25,26,32)(19,27,28,22)(20,30,31,24)(1,4,5,2)(3,7,8,6)(10,14)(13,15)(19,28)(21,29)(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.