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