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