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)(20,33)(21,27)(22,26)(23,38)(24,30)(25,37)(29,44)(31,43)(32,40)(34,48)(35,42)(36,47)(39,45)(41,46)(1,3)(2,5)(4,8)(6,7)(9,10)(11,14)(12,13)(15,16)(17,19,22,30)(18,24,26,28)(20,34,36,29)(21,31,23,32)(25,41,42,39)(27,40,38,43)(33,44,47,48)(35,46,37,45)(2,6)(5,7)(10,13)(14,16)(17,20,23,37,22,36,21,35)(18,25,27,33,26,42,38,47)(19,29,32,46,30,34,31,45)(24,39,40,48,28,41,43,44)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(18,26)(19,30)(25,42)(27,38)(29,34)(31,32)(33,47)(45,46)(3,8)(5,7)(10,13)(14,16)(17,21,22,23)(18,27,26,38)(19,31,30,32)(20,35,36,37)(24,40,28,43)(25,33,42,47)(29,45,34,46)(39,48,41,44)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.