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