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)(19,29,21,26)(20,33,35,25)(22,38,30,28)(24,37,40,32)(31,44,34,42)(36,43,45,47)(39,46,41,48)(1,3,5,4)(2,6,8,7)(9,10)(11,15)(12,14)(13,16)(17,19,30,37,23,21,22,32)(18,24,38,26,27,40,28,29)(20,34,45,46,35,31,36,48)(25,41,47,42,33,39,43,44)(1,3,5,4)(2,7,8,6)(9,11,12,16)(10,13,14,15)(17,20,23,35)(18,25,27,33)(19,31,21,34)(22,36,30,45)(24,39,40,41)(26,44,29,42)(28,43,38,47)(32,46,37,48)(11,16)(13,15)(17,21,23,19)(18,26,27,29)(20,31,35,34)(22,32,30,37)(24,28,40,38)(25,42,33,44)(36,48,45,46)(39,47,41,43)(1,4,5,3)(2,7,8,6)(10,14)(13,15)(18,27)(19,21)(20,35)(28,38)(32,37)(36,45)(39,41)(42,44)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.