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