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