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