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