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