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