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