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