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