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