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