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