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