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