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