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