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