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