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