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