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