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