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