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