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