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