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