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