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