One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,4,8)(17,18,23,27)(19,28,30,40)(20,32,33,25)(21,26,22,37)(24,36,39,31)(29,43,45,42)(34,47,35,41)(38,44,46,48)(9,10)(11,14)(12,13)(15,16)(17,19,21,36,23,30,22,31)(18,24,37,40,27,39,26,28)(20,29,34,48,33,45,35,44)(25,38,47,43,32,46,41,42)(2,6)(7,8)(10,13)(14,16)(17,20,23,33)(18,25,27,32)(19,29,30,45)(21,34,22,35)(24,38,39,46)(26,41,37,47)(28,42,40,43)(31,44,36,48)(1,3,5,4)(2,7,6,8)(9,11)(10,14)(12,15)(13,16)(19,30)(20,33)(24,39)(25,32)(28,40)(31,36)(34,35)(41,47)(1,4,5,3)(2,8,6,7)(11,15)(14,16)(17,21,23,22)(18,26,27,37)(19,31,30,36)(20,34,33,35)(24,40,39,28)(25,41,32,47)(29,44,45,48)(38,43,46,42)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.