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