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