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