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