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