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