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