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