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