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