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