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