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