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