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