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