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