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