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