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