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