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