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