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