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