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