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