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