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