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