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