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