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