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