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