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