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