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