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