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