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