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