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