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