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