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