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