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