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)(23,31)(24,25)(27,35)(29,30)(32,36)(33,34)(6,10)(8,17)(11,19)(12,13)(14,20)(15,18)(21,22)(23,32)(24,30)(25,29)(26,28)(27,33)(31,36)(34,35) involution — undirected(2,4)(21,23,26,34)(22,27,28,36)(24,33,25,31)(29,32,30,35)(5,7,9,16)(6,11,13,20)(8,18,17,15)(10,19,12,14)(22,28)(27,36)(29,30)(32,35)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.