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