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