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