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