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