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