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