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)(12,19)(13,17)(15,18)(21,22,24,27,26,29,25,30)(23,31,32,35,34,36,33,28)(5,6,11,17,9,13,8,10)(7,12,18,20,15,19,14,16)(22,27,29,30)(28,31,35,36)(2,4)(5,7,8,14,9,15,11,18)(6,12,10,16,13,19,17,20)(21,23,24,32,26,34,25,33)(22,28,30,36,29,35,27,31)(7,15)(12,19)(14,18)(16,20)(22,29)(27,30)(28,35)(31,36) 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.