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