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