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