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