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