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