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