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