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