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