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