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