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)(19,24)(20,21)(22,27)(23,25)(26,32)(28,31)(29,30)(33,34,39,42)(35,40,37,41)(36,45,47,38)(43,44,46,48)(2,3)(7,9)(8,10)(15,16)(17,19,23,27)(18,24,25,22)(20,30,26,28)(21,29,32,31)(33,34)(35,40)(36,38)(37,41)(39,42)(43,48)(44,46)(45,47)(2,3)(7,9)(8,10)(15,16)(18,25)(19,27)(20,26)(29,31)(33,35,39,37)(34,40,42,41)(36,46,47,43)(38,44,45,48)(1,3,6,2)(4,9,12,7)(5,8,14,10)(11,15,13,16)(17,20,23,26)(18,21,25,32)(19,28,27,30)(22,29,24,31)(33,36,39,47)(34,38,42,45)(35,43,37,46)(40,48,41,44)(1,4,6,12)(2,7,3,9)(5,13,14,11)(8,16,10,15)(17,21)(18,26)(19,29)(20,25)(22,30)(23,32)(24,28)(27,31)(33,37,39,35)(34,41,42,40)(36,46,47,43)(38,44,45,48)(1,5,6,14)(2,8,3,10)(4,11,12,13)(7,15,9,16)(17,22,23,24)(18,27,25,19)(20,31,26,29)(21,28,32,30)(33,38)(34,36)(35,44)(37,48)(39,45)(40,46)(41,43)(42,47)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.