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