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