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