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