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