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