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