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