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