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