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