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