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