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