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