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