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