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