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