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