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