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