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