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