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