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