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