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