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