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