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