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