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