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