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