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