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