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)(18,22)(19,25)(20,28)(30,32)(34,35)(37,45)(39,41)(43,48)(11,15)(14,16)(18,22)(20,28)(23,26)(27,31)(33,34,38,35)(36,39,44,41)(37,40,45,42)(43,46,48,47)(9,10,12,13)(11,14,15,16)(17,18,21,22)(19,26,25,23)(20,24,28,29)(27,32,31,30)(33,35,38,34)(36,39,44,41)(37,40,45,42)(43,47,48,46)(1,2)(3,5)(4,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,21,25)(18,23,22,26)(20,27,28,31)(24,30,29,32)(33,36)(34,39)(35,41)(37,43)(38,44)(40,46)(42,47)(45,48)(1,3,4,7)(2,5,6,8)(9,11)(10,14)(12,15)(13,16)(17,20)(18,24)(19,27)(21,28)(22,29)(23,30)(25,31)(26,32)(33,37)(34,40)(35,42)(36,43)(38,45)(39,46)(41,47)(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.