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