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)(11,14)(12,21)(13,17)(15,18)(16,20)(19,24)(22,23)(27,34)(29,37)(31,32)(33,36)(2,3)(6,7)(9,11)(10,14)(12,13)(15,19)(16,22)(17,21)(18,24)(20,23)(25,26,30,28)(27,32,34,31)(29,33,37,36)(35,40,38,39)(1,3,5,2)(4,7,8,6)(11,19)(12,20)(14,24)(16,21)(25,27,30,34)(26,31,28,32)(29,38,37,35)(33,40,36,39)(1,4)(2,6)(3,7)(5,8)(9,12)(10,16)(11,13)(14,22)(15,20)(17,24)(18,21)(19,23)(25,27)(26,32)(28,31)(29,35)(30,34)(33,40)(36,39)(37,38) involution — undirected(9,13)(10,17)(11,20)(12,19)(14,16)(15,23)(18,22)(21,24)(25,28,30,26)(27,32,34,31)(29,36,37,33)(35,40,38,39)(9,14)(10,11)(12,22)(13,16)(15,24)(17,20)(18,19)(21,23)(25,29)(26,33)(27,35)(28,36)(30,37)(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.