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