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