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