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