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