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