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