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