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