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