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