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