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