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