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