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