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