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