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