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