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