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)(11,16,13,15)(19,25)(23,28)(26,31)(30,32)(33,34,37,38)(35,39,41,45)(36,43,44,40)(42,48,47,46)(3,8)(5,7)(9,10,14,12)(11,15,13,16)(18,22)(19,25)(24,29)(26,31)(34,38)(35,41)(36,44)(46,48)(9,11,14,13)(10,15,12,16)(17,18)(19,23)(20,24)(21,22)(25,28)(26,30)(27,29)(31,32)(33,34)(35,39)(36,43)(37,38)(40,44)(41,45)(42,48)(46,47)(1,3)(2,5)(4,8)(6,7)(9,12,14,10)(11,15,13,16)(17,19)(18,23)(20,26)(21,25)(22,28)(24,30)(27,31)(29,32)(33,35,37,41)(34,39,38,45)(36,42,44,47)(40,46,43,48)(1,2)(3,5)(4,6)(7,8)(9,13,14,11)(10,15,12,16)(17,20,21,27)(18,24,22,29)(19,26,25,31)(23,30,28,32)(33,36)(34,40)(35,42)(37,44)(38,43)(39,46)(41,47)(45,48)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.