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