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