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