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