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