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