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