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