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