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