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