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