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