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