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