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)(19,28,31,40)(20,32,34,25)(21,26,22,38)(24,37,41,30)(29,45,33,44)(35,47,36,43)(39,46,42,48)(9,10)(11,14)(12,13)(15,16)(17,19,21,37,23,31,22,30)(18,24,38,40,27,41,26,28)(20,33,35,46,34,29,36,48)(25,42,47,44,32,39,43,45)(2,6)(7,8)(10,13)(14,16)(17,20,23,34)(18,25,27,32)(19,29,31,33)(21,35,22,36)(24,39,41,42)(26,43,38,47)(28,44,40,45)(30,46,37,48)(1,3,5,4)(2,7,6,8)(9,11)(10,14)(12,15)(13,16)(20,34)(25,32)(29,33)(35,36)(39,42)(43,47)(44,45)(46,48)(1,4,5,3)(2,8,6,7)(11,15)(14,16)(17,21,23,22)(18,26,27,38)(19,30,31,37)(20,35,34,36)(24,40,41,28)(25,43,32,47)(29,46,33,48)(39,45,42,44)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.