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