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