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