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