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