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