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