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