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