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