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