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