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