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