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