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