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