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