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