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