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