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