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