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