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