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