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