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