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