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