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