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