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