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