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