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