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