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