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