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