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