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