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