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