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