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