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