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