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