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