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