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