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