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