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