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