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