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)(19,25)(20,24)(21,22)(23,26)(27,31)(28,29)(30,32)(33,34,39,40)(35,43,44,41)(36,47,48,37)(38,45,46,42)(2,6)(4,13)(7,9)(11,16)(18,22)(23,25)(24,29)(30,31)(34,40)(35,44)(37,47)(42,45) 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)(36,45,48,42)(37,46,47,38)(1,3)(2,7)(4,11)(5,10)(6,9)(8,14)(12,15)(13,16)(17,19,21,26)(18,23,22,25)(20,27,28,32)(24,30,29,31)(33,36)(34,37)(35,45)(38,43)(39,48)(40,47)(41,46)(42,44)(1,2)(3,7)(4,8)(5,6)(9,10)(11,14)(12,13)(15,16)(17,20,21,28)(18,24,22,29)(19,27,26,32)(23,30,25,31)(33,37)(34,36)(35,46)(38,44)(39,47)(40,48)(41,45)(42,43)(1,4,5,13)(2,8,6,12)(3,11,10,16)(7,14,9,15)(17,18)(19,23)(20,24)(21,22)(25,26)(27,30)(28,29)(31,32)(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.