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