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