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