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