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