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)(21,22,25,27)(23,28,33,34)(24,29,31,35)(26,30,32,36)(5,7,9,15)(6,10,11,13)(8,16,17,14)(12,20,19,18)(22,27)(23,31)(24,33)(26,32)(28,29)(34,35)(2,4)(21,23,25,33)(22,28,27,34)(24,32,31,26)(29,36,35,30)(6,11)(10,13)(12,19)(18,20)(22,27)(28,34)(29,35)(30,36) involution — undirected(5,8,9,17)(6,12,11,19)(7,14,15,16)(10,18,13,20)(21,24)(22,29)(23,32)(25,31)(26,33)(27,35)(28,36)(30,34)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.