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