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