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