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)(21,22,27,26)(23,28,32,35)(24,25,29,33)(30,31,34,36)(5,7,9,15)(6,10,11,13)(8,16,17,14)(12,20,19,18)(21,23,27,32)(22,28,26,35)(24,31,29,36)(25,34,33,30)(2,4)(21,24,26,33,27,29,22,25)(23,30,28,31,32,34,35,36)(6,11)(10,13)(12,19)(18,20)(24,29)(25,33)(30,34)(31,36) involution — undirected(5,8,9,17)(6,12,11,19)(7,14,15,16)(10,18,13,20)(21,25,22,29,27,33,26,24)(23,31,35,30,32,36,28,34)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.