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