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