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