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