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