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