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