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