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