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