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