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)(19,28,29,23)(20,25,33,42)(22,24,35,27)(30,40,32,37)(31,36,43,38)(34,39,46,41)(44,47,45,48)(1,2)(3,7)(4,8)(5,6)(10,11)(12,13)(17,19,21,29)(18,23,26,28)(20,32,33,30)(22,31,35,43)(24,38,27,36)(25,40,42,37)(34,45,46,44)(39,47,41,48)(1,3,5,4)(2,7,6,8)(9,11,14,10)(12,15,13,16)(18,24)(19,29)(20,33)(22,35)(23,36)(25,41)(26,27)(28,38)(37,48)(39,42)(40,47)(44,45)(1,4,5,3)(2,7,6,8)(9,12,14,13)(10,15,11,16)(17,20,21,33)(18,25,26,42)(19,30,29,32)(22,34,35,46)(23,37,28,40)(24,39,27,41)(31,44,43,45)(36,47,38,48)(9,13,14,12)(10,15,11,16)(18,26)(19,29)(20,33)(24,27)(31,43)(34,46)(37,40)(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.