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