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