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