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