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