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