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