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