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