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