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