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