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