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