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