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