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