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