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