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