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