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