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