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