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