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