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)(19,30)(20,33)(21,38)(22,41)(23,29)(24,28)(25,32)(26,37)(27,40)(31,43)(34,44)(35,45)(36,46)(39,48)(42,47)(2,6)(7,8)(9,11,12,16)(10,13,14,15)(17,19)(18,25)(20,34)(21,22)(23,32)(24,40)(26,44)(27,41)(28,38)(29,30)(31,37)(33,43)(35,42)(36,39)(45,46)(47,48)(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,20)(18,26)(19,31)(21,39)(22,42)(23,37)(24,36)(25,43)(27,48)(28,47)(29,33)(30,44)(32,34)(35,40)(38,45)(41,46)(1,4,5,3)(2,8,6,7)(10,14)(11,16)(17,21,22,19,23,40,24,32)(18,27,41,25,29,38,28,30)(20,35,42,34,37,39,36,31)(26,45,46,44,33,48,47,43)(2,6)(7,8)(10,14)(13,15)(17,22,23,24)(18,28,29,41)(19,21,32,40)(20,36,37,42)(25,38,30,27)(26,46,33,47)(31,35,34,39)(43,48,44,45)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.