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