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