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