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