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