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