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