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