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