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