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