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