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