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