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