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