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