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