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