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