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