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