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