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