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