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