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