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