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