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