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