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