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