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