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