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