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