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