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