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