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