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