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