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