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