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