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