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