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