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