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