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