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