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