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