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