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