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