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