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