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