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